When I switched to lipoly, in the E3D's I simply replaced the 10-cell sub-c packs with 3S4P thunder power packs (1/2 lb lighter than the sub-c nimh). Now using 3S3P, (3/4 lb lighter than sub-c) and with these new cells, 3S2P would be just fine. When I notice any power drop, I land. No change in ESC although that would be a safer way to go. My very first 3S4P thunder power pack has been flown over a year now, has 400 cycles on it, and will be going back to them soon so they can test and see what sort of capacity reduction has occurred. At first I was flying 1/2 hour flights with it, but the novelty of that wears off quickly and I found myself flying 2 or 3 10 to 12 minute flights per charge. What I've found is that the power is rather flat during discharge with lipolies (no gradual decrease), so when you do actually see a decrease, you simply land then, and you're still well into the safe range regarding minimum voltage. I'm flying things from 100 watts (3S1P 2100's) to 2500 watts (10S4P 1900's) , and everything in between. No special ESC's. I'm not saying that's the best thing to do,.. a properly set LVC is of course better,..then you don't have to depend on your own self control to land at the appropriate time,.. but it's not an absolute to have a programmable LVC.